454 AMPHlSJf^NID^. 



Monotrophis, Gray, Proc. Zool. Sue. I860, p. 454. 

 Dalopbia, Grai/, I. c. 



Nostril pierced in a small nasal on the lower surface of the snout. 

 Head depressed, with broad projecting snout, with cutting-edge. A 

 strong gular fold. Pectoral segments enlarged. Proeanal pores 

 present or absent. Tail cylindrical, obtuse. 



Africa. 



jSi/nopsis of tlie Species. 



I. A single large shield on the head. 



A. No prseocular. 



42 to 48 segments in an annulus of 



the body ; three lower labials . . 1. capensis, p. 455, 

 32 or 34 segments in an anuulus of 



the body ; two lower labials 2. sp>henorhynchus, p. 455. 



34 segments in an annulus of the body ; 



three lower labials ; no prteaual 



pores 3. ivelw'itscldi, p. 456. 



B. A prseocular 4. guentheri, p. 456. 



II. Two large shields on the head. 



A. Anterior head-shield not longer than the posterior ; a prse- 

 anal pore on each side. 



1. Two pairs of elongate pectoral shields. 



Nasals in contact with each other ... 5. cjuleata, p. 457. 

 Nasals separated by the rostral, which 



is longitudinally bisected 6. dumerilii, p. 457. 



2. Three pairs of elongate pectoral shields. 



30 segments in an annulus of the body 7. scalper, p. 457. 



18 segments in an annulus 8, mcKjnipartita, p. 458. 



B. Anterior head-shields longer than the posterior ; no prseanal 

 pores. 



Pectoral shields large, elongate 9. anchietce, p. 45S. 



Pectoral shields small, very numerous ; 



no pra^ocular 10. jugidaris, p. 459. 



Pectoral shields small, very numerous ; 



a praeocular 11. koppenfelsii, p. 459. 



